Vol. 246, Issue 10, 1948October 01, 1948 EDT
A New Limbless Vertebrate From the Pennsylvanian of Mazon Creek, Illinois
A New Limbless Vertebrate From the Pennsylvanian of Mazon Creek, Illinois
Joseph Tracy Gregory,
Gregory, J. T. (1948). A new limbless vertebrate from the Pennsylvanian of Mazon Creek, Illinois. American Journal of Science, 246(10), 636–663. https://doi.org/10.2475/ajs.246.10.636